Question

我尝试将我的WPF应用程序中的字符串转换为int，但内容为＆＃34; 5＆＃34;，但是得到错误＆＃34;输入字符串格式错误＆＃34;。我已经尝试过Convert.ToInt32和Int32.Parse方法，但都失败了。这是代码：

 Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
            Dim Conexion As New MySql.Data.MySqlClient.MySqlConnection
            Dim CadenaSQL As String = "SELECT * FROM Alumnos ORDER BY nombre"
            Dim CadenaConexion As String = "Data Source=localhost;" & _
                                           "Database=" & "NuevaBD" & ";" & _
                                           "User Id=root;Password="
            Dim Comando As New MySql.Data.MySqlClient.MySqlCommand(CadenaSQL)
            Conexion = New MySql.Data.MySqlClient.MySqlConnection(CadenaConexion)

            Try
                Dim conjuntoDatos As New DataSet()
            Conexion.Open()
            'here dataset i dont know how it
            'Comando.Fill(conjuntoDatos, "Alumnos")
            Conexion.Close()

            Dim tabla As DataTable
            tabla = conjuntoDatos.Tables("Alumnos")
            Dim fila As DataRow
            Me.ListaAlumnos.Items.Clear()
            For Each fila In tabla.Rows
                ' Muestra los datos en un ListBox
                Me.ListaAlumnos.Items.Add(fila.Item("Nombre") & " " & fila.Item("Apellidos"))
            Next
        Catch ex As MySql.Data.MySqlClient.MySqlException
            MsgBox("No se ha podido establecer " & vbCrLf & _
                      "la conexión con la base de datos.", MsgBoxStyle.Critical)
        Finally

            Select Case Conexion.State
                Case ConnectionState.Open
                    Conexion.Close()
            End Select
        End Try
    End Sub

我真的不明白这一点，因为它在办公室电脑上工作正常......

Answer 1

抱歉，我没有正确设置调试器。代码很好。

尝试转换为int32时，字符串格式错误

1 个答案: